Nor-Cal SDC15 Controller - Manual (Page 33)

Chapter 3. INSTALLATION
3-1
■ Installation place
Install the controller in the following locations:
• Common mode voltage for I/O excluding the power supply and relay contact
output:
The voltage to the grounding line must be as follows:
AC: 33V r.m.s. or less and 46.7V peak or less
DC: 70Vdc or less
• Not high or low temperature/humidity.
• Free from sulfide gas or corrosive gas.
• Less dust or soot.
• Appropriately processed locations to prevent direct sunlight, wind or rain.
• Less mechanical vibration and shock.
• Not close to the high voltage line, welding machine or electrical noise generating
source.
• The minimum 15 meters away from the high voltage ignition device for a boiler.
• Less effect by the magnetic.
• No flammable liquid or gas.
CAUTION
Use the SDC15 within the operating ranges recommended in the
specifications (temperature, humidity, voltage, vibration, shock, mounting
direction, atmosphere, etc.).
Failure to do so might cause fire or faulty operation.
Do not block ventilation holes.
Doing so might cause fire or faulty operation.